51501340052 has 6 divisors (see below), whose sum is σ = 90127345098. Its totient is φ = 25750670024.

The previous prime is 51501340049. The next prime is 51501340061. The reversal of 51501340052 is 25004310515.

It can be written as a sum of positive squares in only one way, i.e., 39249949456 + 12251390596 = 198116^2 + 110686^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6437667503 + ... + 6437667510.

It is an arithmetic number, because the mean of its divisors is an integer number (15021224183).

Almost surely, 2^51501340052 is an apocalyptic number.

It is an amenable number.

51501340052 is a deficient number, since it is larger than the sum of its proper divisors (38626005046).

51501340052 is a wasteful number, since it uses less digits than its factorization.

51501340052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12875335017 (or 12875335015 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

Adding to 51501340052 its reverse (25004310515), we get a palindrome (76505650567).

The spelling of 51501340052 in words is "fifty-one billion, five hundred one million, three hundred forty thousand, fifty-two".